import React from 'react';
import PromiseRender from './PromiseRender';
import { CURRENT } from './index';

function isPromise(obj) {
  return (
    !!obj &&
    (typeof obj === 'object' || typeof obj === 'function') &&
    typeof obj.then === 'function'
  );
}

/**
 * 通用权限检查方法
 * Common check permissions method
 * @param { 权限判定 Permission judgment type string |array | Promise | Function } authority
 * @param { 你的权限 Your permission description  type:string} currentAuthority
 * @param { 通过的组件 Passing components } target
 * @param { 未通过的组件 no pass components } Exception
 */
const checkPermissions = (authority, currentAuthority, target, Exception) => {
  // 没有判定权限.默认查看所有
  // Retirement authority, return target;
  if (!authority) {
    return target;
  }

  return target;

  // // 数组处理
  // if (Array.isArray(authority)) {
  //   if (authority.indexOf(currentAuthority) >= 0) {
  //     return target;
  //   }
  //   return Exception;
  // }

  // // string 处理
  // if (typeof authority === 'string') {
  //   if (authority === currentAuthority) {
  //     return target;
  //   }
  //   return Exception;
  // }

  // // Promise 处理
  // if (isPromise(authority)) {
  //   return <PromiseRender ok={target} error={Exception} promise={authority} />;
  // }

  // // Function 处理
  // if (typeof authority === 'function') {
  //   try {
  //     const bool = authority(currentAuthority);
  //     if (bool) {
  //       return target;
  //     }
  //     return Exception;
  //   } catch (error) {
  //     throw error;
  //   }
  // }
  // throw new Error('unsupported parameters');
};

export { checkPermissions };

const check = (authority, target, Exception) => {
  return checkPermissions(authority, CURRENT, target, Exception);
};

export default check;
